永磁圆筒式磁流变液极限扭矩联轴器设计理论及研究

发布时间：2018-03-19 20:04

本文选题：磁流变液　切入点：联轴器　出处：《武汉科技大学》2011年硕士论文　论文类型：学位论文

【摘要】：利用磁流变液的磁流变效应,将其运用到机械传动设备中是一个新的设想。本研究的目的是针对实验室设计出的一种新型永磁型磁流变液极限扭矩联轴器样机进行理论分析,并结合实验分析出了一系列联轴器尺寸参数公式。在外加转矩已知的条件下,可以根据公式直接选择及设计联轴器尺寸参数。设计开发的样机利用稀土永磁体作为磁源,磁流变液作为传递扭矩的介质。具有抗扭冲击能力强。结构简单紧凑、且能传递极限扭矩等特点。本研究的主要内容如下: 1)对磁流变液的传力机理和磁流变效应等进行了研究,分析了磁流变液器件不同的工作模式。结合实验样机,针对两类不同结构形式和不同磁源的磁流变液联轴器进行对比,分析出不同类型磁流变液联轴器的特点,最终确定了利用永磁体作为磁源的联轴器结构形式。 2)对永磁型磁流变液联轴器的结构、磁路、工作原理等进行了理论分析,分析不同的圆筒式磁力传力器件磁路结构,最终确立了永磁圆筒式磁流变液联轴器所适用的一种磁路结构;建立了联轴器的漏磁导计算模型,计算出了联轴器的漏磁系数公式,结合实例计算出了联轴器的漏磁系数。根据理论分析结果给出了联轴器结构参数设计的一些方法。 3)应用Bingham模型,建立了联轴器的力学模型。推导出了联轴器中磁流变液的动量方程;分析了磁流变液流体的几种临界状态,推导出了不同情况下联轴器工作间隙中的流速特性;针对模型对联轴器传递力矩进行理论分析,推导出具有广泛适用型的极限力矩计算公式,并分析了影响联轴器极限力矩值的主要结构参数,在已知外界负载转矩,可以根据公式选择联轴器的尺寸参数,磁铁的尺寸参数。
[Abstract]:Using magnetorheological effect, will be applied to the mechanical equipment is a new idea. The purpose of this study is to analyze the laboratory designed a new type of permanent magnet type magnetic rheological fluid limit torque coupling prototype, and experimental analysis of a series of coupling parameters formula. The plus torque is known, according to the formula selection and design of direct coupling dimensions. Prototype design and development of the use of rare earth permanent magnet as the magnetic source and magnetic fluid as a torque transmission medium. With torsion impact ability. A simple and compact structure, and can transfer characteristics of ultimate torque. The main contents of this study the following:
1) the fluid transfer mechanism and magnetorheological effect were studied, analysis of the magnetorheological fluid devices with different working mode. Combined with the experimental prototype, magneto rheological fluid coupling for two kinds of different structures and different magnetic sources were compared, analysis of the characteristics of different types of magneto rheological fluid coupling. And ultimately determine the use of the permanent magnet as the coupling structure of the magnetic source.
2) structure of permanent magnet type magnetic rheological fluid coupling of the magnetic circuit, the working principle is analyzed in theory, analysis of force of cylinder type magnetic devices with different magnetic circuit structure, finally established a magnet cylindrical magnetorheological fluid coupling is established; calculation model of leakage magnetic coupling the calculated magnetic leakage coefficient formula of coupling, with examples to calculate the leakage coefficient of the coupling. According to the results of theoretical analysis and gives some methods for coupling the design parameters of the structure.
3) the application of Bingham model, established the mechanical model of coupling is deduced. The momentum equation of magnetorheological fluid coupling; analysis of several critical state magneto rheological fluid, deduces the velocity characteristic of the coupling gap under different situations; the model for the transmission torque of the shaft antithetical couplet theory analysis, calculation formula of limit torque is a widely used type is derived, and analyzed the influence of the main structural parameters of coupling limit torque, load torque is known in the world, can choose according to size parameters of the coupling formula, the magnet size parameters.

【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.4

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